Look at the chemical equation:

3H2 + N2 - 2NH3

How many atoms of hydrogen (H) are present on both sides of the equation?

2.3*10^14 and 5.4*10^-3

What is the electron structure of a sodium atom? A. 1s22s22p63s1 B. 2s22s22p63s1 C. 1s22s22p63s6 D. 1s12s22p63s1

How many oxygen atoms are in one unit of the compound ba (oh) 2? 3 1 2 4?

The combustion of 40.10 g of a compound which contains only C, H, Cl and O yields 58.57 g of CO2 and 14.98 g of H2O. Another sample of the compound with a mass of 75.00 g is found to contain 22.06 g of Cl.

Suppose you had 10 mol of NaCl and you dissolved it in exactly 3.00 kg of pure water (the solvent). What would be the molality of the solution in mol/kg?

Which average wind speed do areas need to effectively power wind farms? A:1 mph B:5 mph C:10 mph D:16 mph

What is the total number of moles represented by 20 grams of CACO3 A. 0.1 B. 0.2 C. 1 D. 2

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.

In which changes of state do atoms lose energy?